The Study
Decreased number of p16-positive senescent cells in human endometrium as a marker of miscarriage
This study looked at a tiny marker in the womb lining of women trying to get pregnant with IVF and found that women who had miscarriages tended to have less of this marker than women who had babies. But it doesn’t prove that the marker causes the miscarriage — it just shows they often go together.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
Scientists found that a type of 'old' cell called p16-positive senescent cells helps the womb welcome a baby. Too few of these cells may mean the womb isn't ready.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 544 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — if a woman has had multiple IVF failures or miscarriages, low p16 levels in her womb lining could signal higher risk of losing the next pregnancy.
- 2In women who had live births, 35% of womb surface cells were p16-positive; in those who miscarried, only 12%.
- 3For gland cells, it was 9% vs.
- 43%.
- 5If p16-positive cells were below 12.5% (surface) or 3.2% (glands), miscarriage risk was high.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Journal of Assisted Reproduction and Genetics
Year
2021
Authors
D. Parvanov, R. Ganeva, N. Vidolova, G. Stamenov
Related Content
Claims (5)
Senescent cells contain more p16 protein than non-senescent cells.
The proportion of senescent cells marked by p16 in the uterine lining is the same in women who successfully give birth, have a miscarriage, or do not achieve implantation during IVF.
In women undergoing IVF who have experienced repeated implantation failures, a lower proportion of p16-positive senescent cells in specific endometrial tissues is linked to a higher likelihood of miscarriage, with these cell thresholds correctly identifying pregnancy loss in 71–74% of cases.
In women undergoing IVF during the mid-luteal phase, senescent cells marked by p16 are more abundant in the luminal lining of the uterus than in the glandular tissue or stroma, with the luminal cells showing three times higher average levels and a consistent increase with age.
In women during the mid-luteal phase of the menstrual cycle, the proportion of cells expressing the p16 protein in the endometrial lining increases as maternal age increases.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.